E-Mu Xtreme Lead-1 Manual page 146

LFO Tricks & Tips:
• The Random LFO wave is truly
random and is different for
each voice and layer.
• The Pattern (Pat) waveforms
will sound the same on
different layers and voices.
• Sine + Noise is very useful for
simulating trumpet and flute
vibrato.
When routing Hemi-quaver
to Pitch:
+38 = major scale
-38 = phrygian scale
+76 = whole tone scale
(+38) + (+76) = diminished
(two cords)
odd amount = S+H sound
Note: References to musical
intervals in the pattern LFO
shapes are with the LFO
routed to pitch and a
PatchCord amount of +38
146 E-MU Systems
Shape
LFO waveforms have different shapes. The shape of the waveform deter-
mines the effect of the LFO. LFOs have traditionally been used to add
vibrato or repeating movement to a sound. These new shapes offer a lot of
new programming possibilities.
If you modulate the pitch of an instrument, it's easy to visualize the shape
of the waveform. For example, the sine wave has a smooth, rolling shape
that changes the pitch smoothly. The square waveform changes between
two pitches abruptly. A sawtooth waveform increases the pitch smoothly,
then abruptly changes back down. The available waveforms are shown
below.
R a n d om
S i n e
2 5 % P u l s e
P a t: O c tav e s
+ Octave
Pa t: N ee n e r
C
A#
G
S i n e + N oi s e
.
T r i a ng l e
S qu a r e
1 6% P u l s e
Pa t : F i f t h +O c t a v e
C
G
C
- Octave
S i n e 1 ,2
H e m i - qu a v e r
Edit Menu
Low Frequency Oscillators (LFOs)
Sa w t o o t h
3 3% Pu ls e
1 2% Pu ls e
Pa t : Sus 4 t r ip
F
C
Sine 1, 3, 5
G